Roof curb



FIG. 1 is a bottom view of a roof curb showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a perspective view thereof, taken from the top, front, and right side;

FIG. 8 is a perspective view thereof, taken from the bottom, front and left side;

FIG. 9 is a perspective thereof, taken from the top, rear, and right side;

FIG. 10 is a cross sectional view taken in the direction of line 10-10 of FIG. 2;

FIG. 11 is a detailed enlarged bottom and right perspective view of area 11 circumscribed with FIG. 7; and,

FIG. 12 is a detailed enlarged bottom view of area 12 circumscribed with FIG. 1.

The broken line in FIG. 2 depicts the direction of the cross-section of FIG. 10 and forms no part of the claimed design. All other broken lines denote the boundaries of enlargement areas and form no part of the claimed design. 

CLAIM The ornamental design for a roof curb, as shown and described. 